public void CharacterReplace_WasReplacedWithZUlessFirstLetter_True()
        {
            Translator testTranslator = new Translator();

            Assert.AreEqual("z", testTranslator.CharacterReplace("s"));
        }
        public void CharacterReplace_WasReplacedWith7_True()
        {
            Translator testTranslator = new Translator();

            Assert.AreEqual("7", testTranslator.CharacterReplace("t"));
        }